Febco FRK 805 805YD 806YD 825 825YD 826YD CR S 4 Part of the RK 805YD 806YD 825YD 826YD Series mainline adatile Channel Size – 6″ wide Channel Size – 6″ wide × 4 ft long Specifications Brand Watts EAN 098268010060 Hydronic Item Type Low Water Cut Off Inlet Connection Size 1 IN Inlet Connection Size Metric 25 MM Inlet Connection Type Female Threaded Lead Free NO Outlet Connection Size 1 IN Outlet Connection Type Female Threaded Part Number 0183811 Series N50 UPC 098268010060 This silicone check valve rubber parts kit includes the parts necessary to repair or replace the check valve silicone rubber parts of a 4 inch reduced pressure zone assembly All parts are genuine and original to the valve